Officials are probing how a 51-year-old highway bridge came to collapse in the Italian port city of Genoa yesterday, killing at least 26 people and injuring 16 others as it sent dozens of vehicles tumbling into a heap of concrete and twisted steel.

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“We know if you reduce your body weight by ten percent, you can reduce your pain scores by fifty percent. So we need to consider, is that also happening in these people?” principal Adam Castricum said.

The AFL legend is now back on the tennis court. (9NEWS) ()

Paradigm Biopharmaceuticals is sponsoring current trials, with results to be released by the end of the year.

At the moment that’s the main way patients can access the drug.

However, doctors wanting to use the treatment can apply to the TGA for special access.

“It would be important if there was then an independent randomised control done by another body, to see if they could then reproduce the same results,” Mr Castricum said.

He added that before resorting to expensive treatments, arthritis sufferers should first aim to focus on weight loss and stay active with low impact exercise.